Download size

How many GB is Halcyon Days?

10 GB

That is more than the typical Role-playing (RPG) game, which needs about 6 GB.

Leave at least 17 GB free: games need headroom to unpack updates.

The figure is the storage Steam lists as required for this game, not a measured download.

While exploring ancient ruins, Teflon accidentally releases a mysterious woman and her guardian from their cryosleep. When it's revealed that they are from a lost civilization that shaped the world as it is today, an adventure of treasure, betrayal and friendship begins.